Osl dating sand

*Prices in US$ apply to orders placed in the Americas only.

Prices in GBP apply to orders placed in Great Britain only. All samples showed higher equivalent doses for the post-IR IRSL signal.

Pulsed radar waves were automatically generated at a step size of 0.05 m, and their reflections were recorded. We collected samples for luminescence dating at eight sites in 20.

The GPR data were processed with Reflexw software (Sandmeier Scientific Software, Karlsruhe, Germany). The samples were taken from the bottom of auger holes of at least 90 cm depth so that surface disturbances were avoided.

The Yumigahama Peninsula is on the Japan Sea coast of western Japan (Fig. It is a sandy coastal barrier that is 20 km long and 2.8–4.3 km wide, separating the Japan Sea from the brackish lagoon of Nakaumi Bay (Figs. The Sakai Strait, between the northwestern end of the barrier and the Shimane Peninsula, connects Nakaumi Bay to the Japan Sea.

The sandy beach along the barrier is embayed; it is oriented NNW–SSE at its northwestern end and WNW-ESE at its southeastern end.

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The corrected IRSL ages of the younger samples, coupled with an assumption of residual dose, roughly agreed with the historical shoreline changes, indicating that the rate of shoreline progradation increased markedly during the recent period of mining-related enhanced sediment discharge.Prices in € represent the retail prices valid in Germany (unless otherwise indicated). Prices do not include postage and handling if applicable. Fading tests indicated that IRSL yielded relatively high g-values (11–13%/decade), while post-IR IRSL yielded negative g-values (–5 to –8%/decade).The corrected IRSL age of the oldest sample, 8.1 ± 1.3 ka, was slightly overestimated with respect to its expected age of 5–6.7 ka.Comparison of sample depths with the GPR profile confirmed that our samples were taken from either the uppermost part of the beach facies or the base of the aeolian dune facies.Thus, the depositional age of the samples should young seaward (from YG-1 to YG-8).Data processing included dewow filtering, zero-time correction, time-depth conversion, and static correction. (Tokyo Peil) is the standard datum for elevation measurements in Japan. A light-tight stainless-steel tube (30 cm long, 6.5 cm inside diameter) was hammered into the bottom of each borehole to extract samples of sand that had not been exposed to light.The radar wave velocity was calculated by the common midpoint method at several points along transect. Eight samples were collected (sites YG-1 to YG-8; Fig.Beach ridges that form during seaward migration of a shoreline indicate the successive positions of past shorelines; their age and distribution can therefore provide a geological record of past coastal changes (Tamura, 2012).Because beach-ridge deposits generally lack material suitable for radiocarbon dating (e.g., Isla and Bujalesky, 2000), luminescence dating of sand grains has been used as an alternative method for dating them (e.g., Murray-Wallace , 2015).Sample preparation and luminescence measurement were done at the luminescence laboratory of the Geological Survey of Japan.Samples were prepared under subdued red light to avoid affecting the luminescence signals.

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